Scrambles involve offensive and defensive skaters as well as goalies and result because the puck was not properly handled - either caught or cleared by the goalie creating a rebound to scramble for.

Defensive skaters do not drop the stick to play the puck with gloved hands. Poor technique that is inefficient and may draw a penalty or a penalty shot. Likewise for goalies, a penalty or penalty shot may result at the referees discretion.
As for results, two points.

Post Buffalo with a better team, Detroit, facing fewer SOG/G, Hasek's SV% ranged between .902 and .915, around league averages.

At the same age with vastly superior technique,weaker teams - St.Louis and Toronto, Jacques Plante was surpassing his prime SV% numbers with the Canadiens, nailing .940 and .944 SV%s at a time when the league average was in the .903 to . 907 range. Even on the downside of his career, Plante still manages a .907 vs a .896 league average.

Second point. Results and technique at some point have to translate into a teachable model. This is true for all the top 10 goalies on the final list except Dominik Hasek. The appreciation of vertical angles while unique to Hasek in the DPE did not originate with him. The appreciation of vertical angles in hockey and sports predates Hasek's birth. Common in pre 1980 hockey goalies and other sports - football, soccer, basketball, boxing, baseball, to name a few.

Goalies get a penalty for playing the puck with a hand? Please explain.

.902 SP when Hasek was 43. Nobody else was playing at that age except for Plante.

That's like picking out Plante's 2 years with the Rangers, when he was the worst goalie in the league, as an example. I would never do that.